ENSTROM 480B RFM SUPPLEMENT 2-1FAA Approved: Dec 19/18Report No. 28-AC-078 Dec 3/18CHAPTER 2. NORMAL PROCEDURES2-1. GeneralRefer to the basic RFM for procedures not specific to theGTX 345.The ADS-B Out system is a single point of entry system forMode 3/A code, Flight ID, IDENT functionality andactivating or deactivating emergency status for bothtransponder and ADS-B Out functions. Parameters are setin the transponder at the time of installation and areautomatically incorporated in ADS-B Out broadcasts.2-2. Before TakeoffNOTEThe ADS-B Out system must be operational(“NO 1090ES TX” annunciator extinguishedbefore takeoff) in certain airspaces afterJanuary 1, 2020, as specified by 14 CFR91.225. Requirements outside of the US mayvary based on local regulations.NOTEThe annunciation “NO 1090ES TX” appears inthe lower left corner of the GTX 345 when theADS-B TX is manually turned off or when thereis a transmission malfunction.1. GTX Mode – Verify ALT.2. “NO 1090ES TX” annunciation – extinguished.This electronic document is not linked to a subscription for revision control or distribution. Refer to the Optional EquipmentSupplement Publications Status link under the Technical Support Page of the Enstrom Helicopter website for the current revisionlevel of this Rotorcraft Flight Manual Supplement.UNCONTROLLED COPY WHEN DOWNLOADED OR PRINTED